By dreaming up enticing upgrades to your current services, you can increase your earning potential without adding additional time. Small simultaneous add-ons — like facial sheet masks and luxury hand treatments — also up each service ticket.

A pop-up screen on the Palatine, Ill.-based chain’s website offers visitors a $20 discount as an incentive to join its Mobile Mario club. By signing up, they agree to receive up to four promotional texts per month.

If you find your Tweezerman tweezers, nippers, or scissors getting dull, there’s an easy fix — just ship the implements to the Tweezerman facility, where they’ll be sharpened and shipped back for free.